package com.lagou.dao.impI;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * @Author wsl
 * @Date 2021/10/7 21:46
 * @Project_Name maven
 *
 * 课程模块，DAO层的实现类
 */
public class CourseDaoImpl implements CourseDao {
    //1.创建查询课程列表
    @Override
    public List<Course> findCourseList() {
        try {
            //1.创建QueryRunner对象，自动模式
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            //2.编写sql
            String sql = "SELECT\n" +
                    "   id,\n" +
                    "   course_name,\n" +
                    "   price,\n" +
                    "   sort_num,\n" +
                    "   STATUS\n" +
                    "FROM course WHERE is_del= ? ";
            //3.执行查询，使用BeanListHandle封装
            List<Course> courseList = qr.query(sql, new BeanListHandler<Course>(Course.class), 0);

            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //2.根据条件查询课程信息
    @Override
    public List<Course> findByCourseNameAndStatus(String courseName, String status) {
        try {
            //1.创建QueryRunner对象，自动模式
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //2.编写SQL，当前的查询为多条件不定项查询
            //2.1 创建StringBuffer对象，将SQL字符串 添加到缓冲区
            StringBuffer sb = new StringBuffer("SELECT id,course_name,price,sort_num,STATUS FROM course WHERE 1=1 and is_del = ?");
            //2.2 创建List集合，保存参数
            List<Object> list = new ArrayList<>();
            list.add(0);
            //2.3 判断传入的参数是否为空
            if (courseName != null && courseName != ""){
                sb.append(" AND course_name LIKE ?");
                //用于模糊查询
                courseName = "%"+ courseName +"%";
                //将条件放到list集合中
                list.add(courseName);
            }
            if (status != null && status != ""){
                sb.append(" AND STATUS = ?");
                //将status 转换成 int类型
                int i = Integer.parseInt(status);
                list.add(i);
            }

            //3.执行查询，使用BeanListHandle封装结果
            List<Course> courseList = qr.query(sb.toString(), new BeanListHandler<Course>(Course.class), list.toArray());

            //返回结果
            return courseList;

        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //3.保存课程营销信息
    @Override
    public int saveCourseSalesInfo(Course course) {
        try {
            //1.创建QueryRunner对象，自动模式
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //2.编写SQL
            String sql = "INSERT INTO course(\n" +
                    " course_name,\n" +
                    " brief,\n" +
                    " teacher_name,\n" +
                    " teacher_info,\n" +
                    " preview_first_field,\n" +
                    " preview_second_field,\n" +
                    " discounts,\n" +
                    " price,\n" +
                    " price_tag,\n" +
                    " share_image_title,\n" +
                    " share_title,\n" +
                    " share_description,\n" +
                    " course_description,\n" +
                    " course_img_url,\n" +
                    " STATUS,\n" +
                    " create_time,\n" +
                    " update_time\n" +
                    ") VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

            //3.执行插入操作
            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
            course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),
            course.getPrice_tag(),course.getShare_image_title(),course.getShare_title(),course.getShare_description(),
            course.getCourse_description(),course.getCourse_img_url(),course.getStatus(),course.getCreate_time(),
            course.getUpdate_time()};

            int row = qr.update(sql, param);

            return row;

        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }

    }

    //4.根据课程ID查询课程信息
    @Override
    public Course findCourseById(int id) {
        try {
            //1.创建QueryRunner对象，自动模式
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //2.编写SQL
            String sql = "SELECT \n" +
                    " id,\n" +
                    " course_name,\n" +
                    " brief,\n" +
                    " teacher_name,\n" +
                    " teacher_info,\n" +
                    " preview_first_field,\n" +
                    " preview_second_field,\n" +
                    " discounts,\n" +
                    " price,\n" +
                    " price_tag,\n" +
                    " share_image_title,\n" +
                    " share_title,\n" +
                    " share_description,\n" +
                    " course_description,\n" +
                    " course_img_url,\n" +
                    " STATUS\n" +
                    " FROM course WHERE id = ?";

            //3.执行查询，使用BeanHandle封装结果
            Course course = qr.query(sql, new BeanHandler<Course>(Course.class), id);

            return course;

        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //5.修改课程营销信息
    @Override
    public int updateCourseSalesInfo(Course course) {
        try {
            //1.创建QueryRunner对象，自动模式
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //2.编写SQL
            String sql = " UPDATE course SET\n" +
                    " course_name = ?,\n" +
                    " brief = ?,\n" +
                    " teacher_name = ?,\n" +
                    " teacher_info = ?,\n" +
                    " preview_first_field = ?,\n" +
                    " preview_second_field = ?,\n" +
                    " discounts = ?,\n" +
                    " price = ?,\n" +
                    " price_tag = ?,\n" +
                    " share_image_title = ?,\n" +
                    " share_title = ?,\n" +
                    " share_description = ?,\n" +
                    " course_description = ?,\n" +
                    " course_img_url = ?,\n" +
                    " update_time = ?\n" +
                    " WHERE id = ?";

            //3.执行修改操作
            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
                course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),
                course.getPrice_tag(),course.getShare_image_title(),course.getShare_title(),course.getShare_description(),
                course.getCourse_description(),course.getCourse_img_url(),course.getUpdate_time(),course.getId()};

            int row = qr.update(sql, param);

            return row;

        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    //6.修改课程状态
    @Override
    public int updateCourseStatus(Course course) {
        try {
            //1.创建QueryRunner对象，自动模式
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //2.编写sql
            String sql = "UPDATE course SET STATUS = ?,update_time = ? WHERE id = ?";

            //3.执行修改状态
            Object[] param = {course.getStatus(),course.getUpdate_time(),course.getId()};
            int row = qr.update(sql, param);

            return row;

        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }
}
